Members help me plan my tank lighting for now I'm going to keep my sol super blue lights for my tank build. I have 2 on my 110 right now with a 36 by 24 by 29 tall. The lights only sit about 2 inches above water my new tank will be 48 by 30 by 29 tall. I intend on having the lights sit about 6-8 inches above water inside canopy. Do I need to get one more fixture or will my 2 work sitting that distance above tank. Since tank is 29 deep I'm thinking I may need to get one more fixture for best lighting. Input please !